}

	// Handle 'go env -w' and 'go env -u' before calling buildcfg.Check,
	// so they can be used to recover from an invalid configuration.
	if *envW {
		runEnvW(args)
		return
	}

	if *envU {
		runEnvU(args)
		return
	}

	buildcfg.Check()
	if cfg.ExperimentErr != nil {
		base.Fatal(cfg.ExperimentErr)
	}

	for _, arg := range args {

	}
	return keep
}

const (
	CheckExit = 1 << iota
	ShowOutput
	Background
)

var outputLock sync.Mutex

// run is like runEnv with no additional environment.
func run(dir string, mode int, cmd ...string) string {
	return runEnv(dir, mode, nil, cmd...)
}

// runEnv runs the command line cmd in dir with additional environment env.
// If mode has ShowOutput set and Background unset, run passes cmd's output to

		ldLibPath += ":"
	}
	ldLibPath += tmpdir

	runenv := []string{"LD_LIBRARY_PATH=" + ldLibPath}

	bin := filepath.Join(tmpdir, "m1") + exeSuffix
	run(t, goenv, "go", "build", "-o", bin, "./go2c2go/m1")
	runExe(t, runenv, bin)

	bin = filepath.Join(tmpdir, "m2") + exeSuffix
	run(t, goenv, "go", "build", "-o", bin, "./go2c2go/m2")
	runExe(t, runenv, bin)
}

func TestIssue36233(t *testing.T) {

			args = args[1:]
			if goexp != "" {
				goexp += ","
			}
			goexp += args[0]
			runenv = append(runenv, "GOEXPERIMENT="+goexp)

		case "-godebug": // set GODEBUG environment
			args = args[1:]
			if godebug != "" {
				godebug += ","
			}
			godebug += args[0]
			runenv = append(runenv, "GODEBUG="+godebug)

		default:
			flags = append(flags, args[0])
		}
		args = args[1:]
	}

		goCmd = append(goCmd, "-v")
	}

	// Force only one process at a time on vx32 emulation.
	if gohostos == "plan9" && os.Getenv("sysname") == "vx32" {
		goCmd = append(goCmd, "-p=1")
	}

	runEnv(workdir, ShowOutput|CheckExit, env, append(goCmd, args...)...)
}

func checkNotStale(env []string, goBinary string, targets ...string) {
	goCmd := []string{goBinary, "list"}
	if noOpt {